mirror of
https://github.com/cubefs/cubefs.git
synced 2026-08-02 10:06:14 +00:00
58 lines
1.3 KiB
Go
58 lines
1.3 KiB
Go
// Copyright 2023 The CubeFS Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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// implied. See the License for the specific language governing
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// permissions and limitations under the License.
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package flowctrl
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import "io"
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type rateWriter struct {
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underlying io.Writer
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c *Controller
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}
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func (self *rateWriter) Write(p []byte) (written int, err error) {
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write:
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size := len(p)
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size = self.c.acquire(size)
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n, err := self.underlying.Write(p[:size])
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self.c.fill(size - n)
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written += n
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if err != nil {
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return
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}
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if size != len(p) {
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p = p[size:]
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goto write
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}
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return
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}
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func NewRateWriter(w io.Writer, ratePerSecond int) io.WriteCloser {
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c := NewController(ratePerSecond)
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w = c.Writer(w)
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return struct {
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io.Writer
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io.Closer
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}{
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Writer: w,
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Closer: c,
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}
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}
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func NewRateWriterWithCtrl(w io.Writer, c *Controller) io.Writer {
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w = c.Writer(w)
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return w
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}
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